Is your new thing so fucking amazing that people are going to install your app and give it a chance? Statistically speaking, unless you are best friend with a famous celebrity or Apple decides to feature your app in one of their top categories or search results, you are pretty much fucked
The mobile app boom kicked off in July 2008, when Apple introduced the App Store. Now it is over.
Even the very biggest app publishers are seeing their growth slow down or stop altogether. Most people have all the apps they want and/or need. They’re not looking for new ones.